Grindstone-fixture.



PATENTED NOV. 20, 1906.

0. H. POSTER. GRINDSTONB FIXTURE.

ArpLmAmon FILED MAY 10. 1905.

O w WITNESSES:

l/Vl/E/VTOR Chas. H. Foster.

I/ BY TTOR/VEYS THE NORRIS PETERS co. WASHINGTON, n. c.

PATENTEDRNOV. 20, 1906.

0. H. POSTER. GRINDSTONE FIXTURE. APPLICATION FILED MAY 19. 1906. V

3 SHEETS-SHEET 3 INVENTOH Chas. H Foster.

- ATTORNEYS THE NORRIS PETERS ca wAsmNcraN, n. c

UNITED STATES PATENT OFFICE.

GRlNDSTONE-FIXTURE.

Specification of Letters Patent.

Patented Nov. 2c, 1906.

Application filed May 19, 1905. Serial No. 261,263.

To all whom it may concern:

Be it known that I, CHARLES H. Fos'rnn, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Grindstone- Fixture, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

The object of my invention is to provide a grindstone-fixture including a complete stand, preferably made of cast-iron, which can be readily knocked down, so as to be compactly arranged for storage or shipment, and at the same time can be set up by any person without special mechanical knowledge.

In the accompanying drawings, which illustrate a grindstone-iixture made in accordance with my invention, Figure 1 is a side elevation of the complete fixture with the stone in position. Fig. 2 is an enlarged edge view of the upper end of one of the side frames. Fig. 3 is an enlarged side view of the upper end of one of the side frames looking from the outside. Fig.4 is an enlarged section on the line 4 4 of Fig. 7. Fig. 5 is a view similar to Fig. 3, but looking from the inside of the frame. Fig. 6 is an enlarged section on the line 6 6 of Fig. 8. Fig. 7 is a section on the line 7 7 of Fig. 8. Fig. 8 is a section on the line 8 8 of Fig. 7. Fig. 9 is a side elevation showing a slight modification. Fig. 10 is a view similar to Fig. 9, but showing the brackets removed; and Fig. 11 is an enlarged top plan view, partly in section, showing a detail of. construction.

Like marks of reference refer to similar parts in the several views of the drawings.

10 represents the feet of the stand. These feet are preferably four in number, as best shown in Fig. 6 of the drawings, and together form the base of the stand. Each of the feet 10 is provided with a curved wing 11, by means of which the several feet are secured together. The wings 11 of three of the feet 10 are provided with hooks 12, adapted to interlock with the webs of the adjoining. feet, and the other wing 11 is provided with a lug 13, which is secured to the web of the adjacent foot 10 by means of a bolt 15. In this manner the four feet are securely fastened together by means of the single bolt 15.

This particular constructionis similar to that shown in my application, Serial No. 321,324, filed November 4, 1904, for boiler-stand, and hence is not claimed in the present application, except in combination with other parts.

The four curved wings 11, hereinbefore described, form a central opening in the base of the stand. This central opening is adapted to receive downwardly-projecting semicylindrical portions 16, carried by the two side frames 17. These two semicylindrical portions 16 when placed together are adapted to fit snugly within the central opening of the base. In order to hold the two parts in alinement while they are being inserted in the opening, I prefer to provide one of the parts with two pairs of overlapping lugs 18, one pair being arranged on the downwardlyprojecting portion 16 and the other pair slightly above said downwardly-projecting portion on the main body of the side frame 1 7. The portions 16 are held within the base by means of a set-screw 19, which bears against one of the said parts 16. This setscrew 19 passes through the wing 11 of one of the feet 10, and as said wing is cast it is not practical to have it screw-threaded. Hence an opening is made in the inner side of the wing, which receives a nut 20, in which the said set-screw 19 is threaded. The two side frames 17 can thus be firmly secured in the base by means of the said set-screw 19.

The upper end of each of the side frames 17 is provided with two bearings for the reception of the trunnions 22 of antifriction-rolls 23. Each of the said side frames has secured, preferably to its outer side, a plate 24, which is also provided with a pair of bearings for receiving the opposite trunnions of the said antifriction-rolls 23. These antifriction-rolls form the bearing for the shaft 25, on which the-stone 26 is mounted in any usual manner. The plate 24, arranged at the side of the stone on which the handle 27 is secured, is provided with an upwardly-extending loop 28, which encircles the shaft 25, thus prevent ing the shaft from being displaced from the bearing by any upward pull on the said handle 27. The plate 24 at the opposite side of the stone may be also provided with a similar loop 29, as shown in Fig. 5, or it maybe simply provided with a bifurcated end 30, as shown in Fig. 8. The upper end of the side frame 17 at the side of the stone on which the handle 27 is secured is provided. with a temporary bearing 31, which is adapted to hold one end of the shaft 25 while the stone is being inserted in position, as will be hereinafter described. This temporary bearing 31 is 5 preferably dispensed with in the side frame 17 at the opposite side of the stone, as clearly shown in Fig. 5. The plates 24 are secured in position against the side frames 17 by means of bolts 32 and nuts 33.

In order to provide a table or tool-rest for the stone, I form in the side frames 17 two openings 35 for the reception of apertu'red lugs 36, carried by the brackets 37. The apertures in the lugs 36 are adapted to be placed over conical pins 38, formed on the inner sides of the side frames 17. Secured between the outer and upper ends of the side frames 37 is the table or tool-rest 39. This table or toolrest 39 is preferably formed of wood; but it may be made of metal, as well as the rest of the frame, if so desired. In order to hold the ends of the brackets firmly in contact with. the sides of the table or rest 39 and at the same time to hold the lower and inner ends in position in the openings of the side frames, I provide a bolt 40, which passes through the outer ends of the two brackets 37 just below the table 39. This bo1t'40 is provided with a nut 41, by means of which the parts are drawn firmly into position. I also provide one of the side frames 17 with a loop 42,under which is a stop 43. Through this loop 42 I pass the lower end of a bent bar 44, the lower end of the bar resting upon the stop 43. The upper end. of the bar 44 is provided with a hook 45, from which can be suspended a suitable reservoir 46, for supplying water to the stone 26.

47 is the treadle, which is pivoted to a boss 48, carried by one of the feet 10. Extending from this treadle 47 is a rod 49, having a hook on its upper end, which engages with a crank-pin 50, formed in the handle 27, so that the stone may be turned either by hand or by the treadle 47.

In assembling the various parts of the grindstone-fixture the feet are secured together, as above described, by interlocking the hooks 12 with the flanges of the adjacent feet 10 and passing the bolt 15 through the lug 13 and the web of the adjacent foot After this the semicylindrical projections 16 of the side frames 17 are placed within the cen tral opening formed in the base and the setscrew 19 tightened to hold the said parts firmly in position. After this the grindstone, with the shaft secured therein in the usual manner, is placed in position by placing one end of the shaft upon the two antifrictionrolls 23 in one of the side frames. The plate 24, and consequently the rolls 23, being removed from the other side frame, the opposite end of the shaft 25 can now be rested on the temporary bearing 31, after which the 65 plate 24 with the rolls 23 are raised into position, thus raising the shaft 25 off the tem porary bearing and allowing it to rest upon the rolls at both sides of the stone. plate 24 is now secured inpositionbymeans of the bolt 32, and all that is necessary to completely assemble the parts is to place the brackets 37 in position, with the table or rest 39 between their outer ends, and secure the outer ends together by means of the bolt 40 and nut 41.

In Figs. 9, 10, and 11 I have shown the fixture modified so as to constitute what is termed a "velocipede-grindstone, the frame being provided'with a seat and the crankshaft with two pedals, so that the stone may be set in motion by both feet of the operator. In this construction the handle 27 is provided with the crank-pin 50, as in the construction previously described, and in addi tion the opposite end of the shaft 25 is provided with a crank-arm 52, having a crank pin 53. The crank-pins and 53 are provided with connecting rods or straps 54, which are pivoted to the said crank-pins in the usual manner. The lower ends of each of these rods 54 are turned outwardly, so as to form a pedal 55. The rods 54 slide through slots 56 formed in the guide-pieces 57, which are attached to some part of the frame, and preferably to the wings 11 of the feet 10. 58 is the seat, which is attached to the rest or table 39. The pair of feet 10 beneath the seat 58 are extended, as shown at 59, so as to properly support the weight of the operator upon the seat. It will be evident that as the stone is always turned toward the operator the pull on the connecting-rods 54 will be substantially in a straight line and there will be but little friction upon the sides of the slots 56 in the guide-pieces 57.

Having fully described my invention, what I claim as new, and desire to secure by Let ters Patent of the United States, is

1. In a grindstone-fixture, the combination With side frames provided with bearings for antifriction -rolls, of plates removably secured to said side frames and also provided with bearings for antifriction-rolls, and antifriction-rolls journaled in said bearings.

2. In a grindstone-fixture, the combination with a base, of removable side frames carried thereby and provided with bearings for antifriction-rolls, plates removably secured to said side frames and also provided with bearings for antifriction-rolls, and antifriction-rolls journaled in said bearings.

3. In a grindstone-fixture, the combination with a base, of side frames removably carried by said base, means for securing the grindstone in said side frames, brackets removably carried by said side frames, and a table or rest carried by said brackets.

4. In a grindstone-fixture, the combination with side frames provided with bearings for antifriction-rolls, of a support for the The i grindstone-shaft carried by one of said side frames, plates removably carried by said side frames and also provided with bearings for antifriction-rolls, and antifrictionrolls journaled in said bearings.

5. In a grindstone-fixture, the combination with side frames provided with bearings for antifriction-rolls, of plates removably secured to said side frames and also provided with bearings for antifriction-rolls, one of said parts being provided with a retainingloop for the axis, and antifriction-rolls in said bearings.

6. In a grindstone-fixture, the combina: tion with side frames provided with bearings for antifriction-rolls, of plates removably secured to said side frames and also provided with bearings for a-ntifriction-rolls, one of said plates being provided with a retainingloop for the axis, and antifriction-rolls in said bearings.

7. In a grindstone-fixture, the combination with a base formed of separable feet, of means for securing said feet together, a pair of separable side frames, means for securing said side frames in said base, and means for supporting a grindstone from said side frames.

8. In a grindstone-fixture, the combination with a base composed of interlocking feet and provided with a central opening, of a pair of side frames, means for securing said side frames in the central opening of said base, and means for supporting a grindstone from said side frames.

9. In a grindstone-fixture, the combination with a base formed of separable feet, of a pair of side frames, means for removably securing said side frames in said base, means for supporting a grindstone from said side frames, a pair of brackets removably secured by said side frames, and a table or rest carried by said brackets.

10. In a grindstonefixture, the combination With a base formed of separable feet eachprovided with a curved wing for securing the said feet together to form a central opening, of a pair of side frames provided with extensions projecting into said opening, overlapping lugs for causing said extensions to register, and a set-screw for holding said extensions in said opening.

11'. A grindstone -fixture comprising a base, side frames extending upwardly from the base, a grindstone mounted in the upper ends of the side frames, crank-arms for rotating the grindstone, brackets carried by the side frames, a seat at the upper ends of the brackets, guides adjacent to the lower ends of the side frames, and rods extending from the cranks down through the guides and provided at their lower ends with foot-pieces or pedals. r

In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two subscribing witnesses.

CHARLES H. FOSTER.

Witnesses:

W. A. ALEXANDER, BENNETTE PIKE. 

